* Survival: The wild dogs were a constant threat to her survival. They were hungry, aggressive, and relentless in their pursuit of food, which included Karana.
* Protection of her remaining possessions: The dogs were attacking her possessions, including her food stores and her tools. This further threatened her ability to sustain herself on the island.
* Revenge: Karana's brother, Ramo, was killed by the dogs. This act of revenge was deeply personal and motivated by grief and anger.
* Establishing dominance: By killing the dogs, Karana established herself as the dominant force on the island. This act asserted her control over her environment and her own destiny.
Ultimately, killing the dogs was a necessary step for Karana to survive on the island. It was a brutal act, but one that was born of necessity, revenge, and a desire to control her fate in the face of overwhelming adversity.